Bad Boids is a research initiative by 100cells (Costanzo D'Angelis, Stefano Cieri).
The KDTree folder contains files from John Tsiombikas' library. We suggest you to refer directly to the kdtree project page for anything pertaining to that.
No real documentation still exists, by now; we're working on a new version which we'll document as soon as possible. The project page will be here.